Additionally, ISOTEC utilizes GEO’s C3 Technology for capturing vapors during GTR thermal projects. The C3 Technology is a combination of compression, cooling, and condensation processes with a proprietary regenerative adsorption technology that efficiently recovers volatile organic compounds (VOCs) from the off-gas vapor stream of soil vapor extraction (SVE), dual phase extraction (DPE), and GTR thermal systems. The chemical is recovered as a non-aqueous phase liquid (NAPL) that is temporarily containerized in appropriate vessels for recycling or proper disposal. Generally, greater than 99.98% of the VOCs are recovered from the vapor stream. Depending upon the contaminant and State or local agency, final effluent may be polished with granular activated carbon (GAC).